Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Plate Tectonics
| Term | Definition |
|---|---|
| Asthenosphere | below lithosphere, |
| Continental Drift | lateral movement of continents |
| lithosphere | solid portion of earth; crust |
| pangaea | hypothetical land mass that existed when all continents were joined |
| plate | crustal plate |
| plate tectonics | lithosphere divided into a number of crustal plates, each move |
| seafloor spreading | new ocean floor is created as molten rises in between plate margins |
| abyssal plains | is an underwater plain on the deep ocean floor |
| trench | long, narrow excavation in ground |
| subduction zone | collision of crustal plates results in one plate being overriden by the other |
| convection | transfer of heat by circulation |
| earthquake | series of vibrations induced in earth's crust |
| epicenter | point directly above the true center of disturbance, where shock waves of an earthquake come from |
| fault | break in continuity of a body of rock |
| focus | point of origin of an earthquake |
| magnitude | size |
| normal fault | gravity fault; fault along inclined plane where upper side has moved downward |
| reverse fault | rock above fault plane is displaced upward relative to rock below |
| p-wave | earthquake wave that travels through the interior of earth, first to be recorded |
| s-wave | transverse earthquake wave that travels through the interior of earth, second to be recorded |
| seismograph | instruments used to measure and record vibrations from earthquake |
| strike-slip fault | fault where movement is along strike of fault |
| tsunami | large sea wave produced by a seaquake or underwater volcanic eruption |
| batholith | large body of intrusive rock that crystallized below earth's surface |
| caldera | basinlike depression from explosion or collapse of center of volcano |
| cinder cone volcano | A steep, conical hill consisting of glassy volcanic fragments that accumulate around and downwind from a volcanic vent |
| dike | narrow cross-cutting mass of igneous rock intruded into a fissure in older rock. |
| hot spot | a region of molten rock below and within the lithosphere that persists long enough to leave a record of uplift and volcanic activity at the earth's surface. |
| shield volcano | a broad volcano built up from the repeated nonexplosive eruption of basalt to form a low dome or shield, usually having a large caldera at the summit |
| sill | a tabular body of intrusive igneous rock, ordinarily between beds of sedimentary rocks or layers of volcanic ejecta |
| volcano | a vent in the earth's crust through which lava, steam, ashes, etc., are expelled, either continuously or at irregular intervals |
| anticline | an anticlinal rock structure. |
| syncline | are folds in which each half of the fold dips toward the trough of the fold |
| tension | the state of being stretched tight. |
| shear | the tendency of forces to deform or fracture a member or a rock in a direction parallel to the force, as by sliding one section against another. |
| uplift | to lift up |
| fissure | a narrow opening produced by cleavage or separation of parts |
| pyroclastic flow | is a fast-moving current of hot gas and rock |
| geyser | a hot spring that intermittently sends up fountainlike jets of water and steam into the air |
Created by:
3083291
Popular Earth Science sets